1 /*- 2 * Copyright (c) 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * This code is derived from software contributed to Berkeley by 6 * Kenneth Almquist. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 4. Neither the name of the University nor the names of its contributors 17 * may be used to endorse or promote products derived from this software 18 * without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30 * SUCH DAMAGE. 31 */ 32 33 #ifndef lint 34 #if 0 35 static char sccsid[] = "@(#)histedit.c 8.2 (Berkeley) 5/4/95"; 36 #endif 37 #endif /* not lint */ 38 #include <sys/cdefs.h> 39 __FBSDID("$FreeBSD$"); 40 41 #include <sys/param.h> 42 #include <limits.h> 43 #include <paths.h> 44 #include <stdio.h> 45 #include <stdlib.h> 46 #include <unistd.h> 47 /* 48 * Editline and history functions (and glue). 49 */ 50 #include "shell.h" 51 #include "parser.h" 52 #include "var.h" 53 #include "options.h" 54 #include "main.h" 55 #include "output.h" 56 #include "mystring.h" 57 #ifndef NO_HISTORY 58 #include "myhistedit.h" 59 #include "error.h" 60 #include "eval.h" 61 #include "memalloc.h" 62 63 #define MAXHISTLOOPS 4 /* max recursions through fc */ 64 #define DEFEDITOR "ed" /* default editor *should* be $EDITOR */ 65 66 History *hist; /* history cookie */ 67 EditLine *el; /* editline cookie */ 68 int displayhist; 69 static FILE *el_in, *el_out, *el_err; 70 71 STATIC char *fc_replace(const char *, char *, char *); 72 73 /* 74 * Set history and editing status. Called whenever the status may 75 * have changed (figures out what to do). 76 */ 77 void 78 histedit(void) 79 { 80 81 #define editing (Eflag || Vflag) 82 83 if (iflag) { 84 if (!hist) { 85 /* 86 * turn history on 87 */ 88 INTOFF; 89 hist = history_init(); 90 INTON; 91 92 if (hist != NULL) 93 sethistsize(histsizeval()); 94 else 95 out2fmt_flush("sh: can't initialize history\n"); 96 } 97 if (editing && !el && isatty(0)) { /* && isatty(2) ??? */ 98 /* 99 * turn editing on 100 */ 101 char *term; 102 103 INTOFF; 104 if (el_in == NULL) 105 el_in = fdopen(0, "r"); 106 if (el_err == NULL) 107 el_err = fdopen(1, "w"); 108 if (el_out == NULL) 109 el_out = fdopen(2, "w"); 110 if (el_in == NULL || el_err == NULL || el_out == NULL) 111 goto bad; 112 term = lookupvar("TERM"); 113 if (term) 114 setenv("TERM", term, 1); 115 else 116 unsetenv("TERM"); 117 el = el_init(arg0, el_in, el_out, el_err); 118 if (el != NULL) { 119 if (hist) 120 el_set(el, EL_HIST, history, hist); 121 el_set(el, EL_PROMPT, getprompt); 122 el_set(el, EL_ADDFN, "sh-complete", 123 "Filename completion", 124 _el_fn_sh_complete); 125 } else { 126 bad: 127 out2fmt_flush("sh: can't initialize editing\n"); 128 } 129 INTON; 130 } else if (!editing && el) { 131 INTOFF; 132 el_end(el); 133 el = NULL; 134 INTON; 135 } 136 if (el) { 137 if (Vflag) 138 el_set(el, EL_EDITOR, "vi"); 139 else if (Eflag) 140 el_set(el, EL_EDITOR, "emacs"); 141 el_set(el, EL_BIND, "^I", "sh-complete", NULL); 142 el_source(el, NULL); 143 } 144 } else { 145 INTOFF; 146 if (el) { /* no editing if not interactive */ 147 el_end(el); 148 el = NULL; 149 } 150 if (hist) { 151 history_end(hist); 152 hist = NULL; 153 } 154 INTON; 155 } 156 } 157 158 159 void 160 sethistsize(hs) 161 const char *hs; 162 { 163 int histsize; 164 HistEvent he; 165 166 if (hist != NULL) { 167 if (hs == NULL || *hs == '\0' || 168 (histsize = atoi(hs)) < 0) 169 histsize = 100; 170 history(hist, &he, H_SETSIZE, histsize); 171 } 172 } 173 174 void 175 setterm(const char *term) 176 { 177 if (rootshell && el != NULL && term != NULL) 178 el_set(el, EL_TERMINAL, term); 179 } 180 181 int 182 histcmd(int argc, char **argv) 183 { 184 int ch; 185 const char *editor = NULL; 186 HistEvent he; 187 int lflg = 0, nflg = 0, rflg = 0, sflg = 0; 188 int i, retval; 189 const char *firststr, *laststr; 190 int first, last, direction; 191 char *pat = NULL, *repl = NULL; 192 static int active = 0; 193 struct jmploc jmploc; 194 struct jmploc *savehandler; 195 char editfilestr[PATH_MAX]; 196 char *volatile editfile; 197 FILE *efp = NULL; 198 int oldhistnum; 199 200 if (hist == NULL) 201 error("history not active"); 202 203 if (argc == 1) 204 error("missing history argument"); 205 206 optreset = 1; optind = 1; /* initialize getopt */ 207 opterr = 0; 208 while (not_fcnumber(argv[optind]) && 209 (ch = getopt(argc, argv, ":e:lnrs")) != -1) 210 switch ((char)ch) { 211 case 'e': 212 editor = optarg; 213 break; 214 case 'l': 215 lflg = 1; 216 break; 217 case 'n': 218 nflg = 1; 219 break; 220 case 'r': 221 rflg = 1; 222 break; 223 case 's': 224 sflg = 1; 225 break; 226 case ':': 227 error("option -%c expects argument", optopt); 228 case '?': 229 default: 230 error("unknown option: -%c", optopt); 231 } 232 argc -= optind, argv += optind; 233 234 /* 235 * If executing... 236 */ 237 if (lflg == 0 || editor || sflg) { 238 lflg = 0; /* ignore */ 239 editfile = NULL; 240 /* 241 * Catch interrupts to reset active counter and 242 * cleanup temp files. 243 */ 244 savehandler = handler; 245 if (setjmp(jmploc.loc)) { 246 active = 0; 247 if (editfile) 248 unlink(editfile); 249 handler = savehandler; 250 longjmp(handler->loc, 1); 251 } 252 handler = &jmploc; 253 if (++active > MAXHISTLOOPS) { 254 active = 0; 255 displayhist = 0; 256 error("called recursively too many times"); 257 } 258 /* 259 * Set editor. 260 */ 261 if (sflg == 0) { 262 if (editor == NULL && 263 (editor = bltinlookup("FCEDIT", 1)) == NULL && 264 (editor = bltinlookup("EDITOR", 1)) == NULL) 265 editor = DEFEDITOR; 266 if (editor[0] == '-' && editor[1] == '\0') { 267 sflg = 1; /* no edit */ 268 editor = NULL; 269 } 270 } 271 } 272 273 /* 274 * If executing, parse [old=new] now 275 */ 276 if (lflg == 0 && argc > 0 && 277 ((repl = strchr(argv[0], '=')) != NULL)) { 278 pat = argv[0]; 279 *repl++ = '\0'; 280 argc--, argv++; 281 } 282 /* 283 * determine [first] and [last] 284 */ 285 switch (argc) { 286 case 0: 287 firststr = lflg ? "-16" : "-1"; 288 laststr = "-1"; 289 break; 290 case 1: 291 firststr = argv[0]; 292 laststr = lflg ? "-1" : argv[0]; 293 break; 294 case 2: 295 firststr = argv[0]; 296 laststr = argv[1]; 297 break; 298 default: 299 error("too many args"); 300 } 301 /* 302 * Turn into event numbers. 303 */ 304 first = str_to_event(firststr, 0); 305 last = str_to_event(laststr, 1); 306 307 if (rflg) { 308 i = last; 309 last = first; 310 first = i; 311 } 312 /* 313 * XXX - this should not depend on the event numbers 314 * always increasing. Add sequence numbers or offset 315 * to the history element in next (diskbased) release. 316 */ 317 direction = first < last ? H_PREV : H_NEXT; 318 319 /* 320 * If editing, grab a temp file. 321 */ 322 if (editor) { 323 int fd; 324 INTOFF; /* easier */ 325 sprintf(editfilestr, "%s/_shXXXXXX", _PATH_TMP); 326 if ((fd = mkstemp(editfilestr)) < 0) 327 error("can't create temporary file %s", editfile); 328 editfile = editfilestr; 329 if ((efp = fdopen(fd, "w")) == NULL) { 330 close(fd); 331 error("can't allocate stdio buffer for temp"); 332 } 333 } 334 335 /* 336 * Loop through selected history events. If listing or executing, 337 * do it now. Otherwise, put into temp file and call the editor 338 * after. 339 * 340 * The history interface needs rethinking, as the following 341 * convolutions will demonstrate. 342 */ 343 history(hist, &he, H_FIRST); 344 retval = history(hist, &he, H_NEXT_EVENT, first); 345 for (;retval != -1; retval = history(hist, &he, direction)) { 346 if (lflg) { 347 if (!nflg) 348 out1fmt("%5d ", he.num); 349 out1str(he.str); 350 } else { 351 char *s = pat ? 352 fc_replace(he.str, pat, repl) : (char *)he.str; 353 354 if (sflg) { 355 if (displayhist) { 356 out2str(s); 357 flushout(out2); 358 } 359 evalstring(s, 0); 360 if (displayhist && hist) { 361 /* 362 * XXX what about recursive and 363 * relative histnums. 364 */ 365 oldhistnum = he.num; 366 history(hist, &he, H_ENTER, s); 367 /* 368 * XXX H_ENTER moves the internal 369 * cursor, set it back to the current 370 * entry. 371 */ 372 retval = history(hist, &he, 373 H_NEXT_EVENT, oldhistnum); 374 } 375 } else 376 fputs(s, efp); 377 } 378 /* 379 * At end? (if we were to lose last, we'd sure be 380 * messed up). 381 */ 382 if (he.num == last) 383 break; 384 } 385 if (editor) { 386 char *editcmd; 387 388 fclose(efp); 389 editcmd = stalloc(strlen(editor) + strlen(editfile) + 2); 390 sprintf(editcmd, "%s %s", editor, editfile); 391 evalstring(editcmd, 0); /* XXX - should use no JC command */ 392 INTON; 393 readcmdfile(editfile); /* XXX - should read back - quick tst */ 394 unlink(editfile); 395 } 396 397 if (lflg == 0 && active > 0) 398 --active; 399 if (displayhist) 400 displayhist = 0; 401 return 0; 402 } 403 404 STATIC char * 405 fc_replace(const char *s, char *p, char *r) 406 { 407 char *dest; 408 int plen = strlen(p); 409 410 STARTSTACKSTR(dest); 411 while (*s) { 412 if (*s == *p && strncmp(s, p, plen) == 0) { 413 while (*r) 414 STPUTC(*r++, dest); 415 s += plen; 416 *p = '\0'; /* so no more matches */ 417 } else 418 STPUTC(*s++, dest); 419 } 420 STACKSTRNUL(dest); 421 dest = grabstackstr(dest); 422 423 return (dest); 424 } 425 426 int 427 not_fcnumber(const char *s) 428 { 429 if (s == NULL) 430 return (0); 431 if (*s == '-') 432 s++; 433 return (!is_number(s)); 434 } 435 436 int 437 str_to_event(const char *str, int last) 438 { 439 HistEvent he; 440 const char *s = str; 441 int relative = 0; 442 int i, retval; 443 444 retval = history(hist, &he, H_FIRST); 445 switch (*s) { 446 case '-': 447 relative = 1; 448 /*FALLTHROUGH*/ 449 case '+': 450 s++; 451 } 452 if (is_number(s)) { 453 i = atoi(s); 454 if (relative) { 455 while (retval != -1 && i--) { 456 retval = history(hist, &he, H_NEXT); 457 } 458 if (retval == -1) 459 retval = history(hist, &he, H_LAST); 460 } else { 461 retval = history(hist, &he, H_NEXT_EVENT, i); 462 if (retval == -1) { 463 /* 464 * the notion of first and last is 465 * backwards to that of the history package 466 */ 467 retval = history(hist, &he, last ? H_FIRST : H_LAST); 468 } 469 } 470 if (retval == -1) 471 error("history number %s not found (internal error)", 472 str); 473 } else { 474 /* 475 * pattern 476 */ 477 retval = history(hist, &he, H_PREV_STR, str); 478 if (retval == -1) 479 error("history pattern not found: %s", str); 480 } 481 return (he.num); 482 } 483 484 int 485 bindcmd(int argc, char **argv) 486 { 487 488 if (el == NULL) 489 error("line editing is disabled"); 490 return (el_parse(el, argc, (const char **)argv)); 491 } 492 493 #else 494 #include "error.h" 495 496 int 497 histcmd(int argc, char **argv) 498 { 499 500 error("not compiled with history support"); 501 /*NOTREACHED*/ 502 return (0); 503 } 504 505 int 506 bindcmd(int argc, char **argv) 507 { 508 509 error("not compiled with line editing support"); 510 return (0); 511 } 512 #endif 513